Drilldown: Patents
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Patents > Grant date:
1840 - 1849
& Assigned to:
None
& National tech categories:
USPC 40/90
& CPCs
:
CPC B63H1/04
or
CPC B64B1/00
or
CPC B64C3/385
& Family year:
1800 - 1899
& First filing:
Yes
& Number of text pages:
2 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.